>I've seen this problem before, but I don't remember the solution.
>
>- Launch form A
>- Launch form B
>- Move form B around on the screen and its ghost image appears in form A
>
>Note that FormA.Lockscreen = .F.
>
>Now, here's the weird part
>
>- Launch form B
>- Launch form A
>- Click on form B to make it the active form
>- Move form B around on the screen. I get the expected behavior. No ghost image appears.
>
>Any ideas?

Under Display Properties...Effects do you have "Show window contents while dragging" on or off? Does changing it (especially switching it off) make any difference? If so I'd suspect video driver issues.

If you're using a recent nVidia-based card try out the Detonator series drivers at their web site.